[3] Kathēkonta are contrasted, in Stoic ethics, with katorthōma (κατόρθωμα; plural: katorthōmata), roughly "perfect action" According to Stoic philosophy, each being, whether animate or inanimate (plant, animal or human), carries on fitting actions corresponding to its own nature, which is the primary sense of kathēkon.
Stoics believe that all virtues are intertwined and that the perfect act encompasses all of them.
A list of kathēkonta would include: to stay in good health, to respect one's parents, etc.
Intermediary actions refers to "indifferent things" (ἀδιάφορα – adiaphora), which are in themselves neither good nor bad, but may be used in a convenient way or not.
These are not excluded from the domain of morality as one might expect: Cicero thus underlined, in De Finibus Bonorum et Malorum (About the Ends of Goods and Evils, III, 58–59), that when the wise person acts in the sphere of "indifferent things," he still acts conveniently, according to his own nature.